It's not something that came out of nowhere. I mean, if devs could just slap a VR cam on normal WASD controlled FPS games and call it a day, they would. It would be much cheaper and easier. Any time someone tries to cheap out like this, though, the VR community throws a collective fit and absolutely blasts the devs for it. Turns out when people are used to interacting with VR environments with their own hands it's difficult for them to go back to anything less."Industry standard" sucks though. FDev would immediately have the best VR FPS on the market just by allowing VR with keyboard+mouse/controller/hotas/whatever-we-configure. It boggles my mind why the "industry" can't seem to figure this out.
I find it entirely plausible this is exactly what FD is worried about. That if their VR implementation doesn't at least match that of No Man's Sky, they'll be review bombed by angry VR users accusing them of half-baking it. And from everything I've seen while interacting with various VR-related subreddits and other VR communities, you know, I do believe that yeah this is probably what would happen.
Personally I wouldn't mind a minimal implementation that uses the same controls as the flat version, but what the VR community at large expects as a standard is another thing, and there's probably not much we can do to influence that.